Find IRS forms, instructions, publications, and notices for prior years back to 1864.

If a PDF file won't open, try downloading the file to your device and opening it using Adobe Acrobat. View more information about Using IRS Forms, Instructions, Publications and Other Item Files.

Click on a column heading to sort the list by the contents of that column.

  1. Enter a term in the Find box
  2. Click the Search button
Find Help
Product Number Title Revision Date
Form 8878 (SP) IRS e-file Signature Authorization for Application for Extension of Time to File Form 4868 (SP) or Form 2350 (SP) (Spanish version) 2011
Form 8878 (SP) IRS e-file Signature Authorization for Application for Extension of Time to File Form 4868 (SP) or Form 2350 (SP) (Spanish version) 2010
Form 8878 (SP) IRS e-file Signature Authorization for Application for Extension of Time to File Form 4868 (SP) or Form 2350 (SP) (Spanish version) 2009
Form 8878 (SP) IRS e-file Signature Authorization for Application for Extension of Time to File Form 4868 (SP) or Form 2350 (SP) (Spanish version) 2008
Form 8878 (SP) IRS e-file Signature Authorization for Application for Extension of Time to File Form 4868 (SP) or Form 2350 (SP) (Spanish version) 2007
Form 8878 (SP) IRS e-file Signature Authorization for Application for Extension of Time to File Form 4868 (SP) or Form 2350 (SP) (Spanish version) 2006
Form 8878 (SP) IRS e-file Signature Authorization for Application for Extension of Time to File Form 4868 (SP) or Form 2350 (SP) (Spanish version) 2005
Form 8878 (SP) IRS e-file Signature Authorization-Application for Extension of Time to File (Spanish version) 2004